I concur with Carolyn that Natchez is absolutely fantastic; however, I would only go during the Spring or Fall Pilgrimage tours; a lot more houses are open to the public. Here is info on pilgrimages:
🚢 Cruise with your favorite Keene Luxury Travel Staff Member! 💰 5% KLT Reward plus Shipboard Credit available (amount varies per voyage)! 💲 Offering Enhanced KLT Rewards on voyages hosted by Ngaire & Clay!